Milwaukee police once again successfully used an iPhone app to track down suspects in an armed robbery.

A 31-year-old man told police he was exiting his car in the 2500 block of N. Bremen St. about 3:35 a.m. Thursday when a man approached him, pointed a gun at him and demanded his possessions, according to a police news release. The suspect took the man's phone and stole his car.

The victim had "Find My iPhone" installed on his phone and computer. Officers were able to use the app to trace the phone to the area of the 900 block of W. Center St. where the stolen vehicle was found in a parking lot about 4 a.m. Thursday, police said.

As officers approached the car, two suspects, ages 16 and 17, fled on foot but were arrested soon after. The stolen cellphone was found in possession of the suspects and the case will be referred to the Milwaukee County district attorney's office, police said.

Earlier this year, Milwaukee police used the same app to track a man accused of ambushing his ex-girlfriend in her Mount Mary University dorm room and holding her at gunpoint.

Smartphones have been driving robberies around the country, so much so that law enforcement and other officials began an initiative called "Secure Our Smartphones," which included advocacy for a "kill switch" in the phones to render them useless to thieves once it has been remotely activated.

Apple added the switch last September. This week, authorities said robberies and thefts of Apple products have steeply declined since the addition of the switch. Google and Microsoft will incorporate a kill switch into their next version of operating systems on smartphones.

In May, Minnesota became the first state to mandate a kill switch on all smartphones and tablets sold in the state beginning July 2015.